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TOG RATINGS, WARMTH and QUALITY

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					                                    TOG RATINGS, WARMTH and QUALITY
                                        Some information from the internet (italics added)

       1.        W hat's a Tog Rating? Does it tell you how w arm a quilt w ill be or how good the quality of a quilt is?
                 Not really. It helps, but it is far from a com plete answer.
                 A Tog is a unit of m easurem ent for the warm th of a quilt. The trouble is that tog ratings are calculated in a
                 laboratory using a new quilt on a flat surface. Now you are not a flat surface, and how the quilt drapes round
                 you is also very important.
                 After you've slept under it a few tim es your quilt isn't new, and poor quality quilts lose their tog ratings fast,
                 particularly if they're washed. So a tog rating is at best only a rough guide to how warm you'll be.
                 It is true that a very cheap quilt will have a low tog rating, and will be m ade of poor quality m aterials. But of
                 itself the tog rating tells you nothing about a quilt's quality
                 So, when you're choosing a quilt, by all m eans take a note of the tog rating. But if you want a good buy, don't
                 stop there.


       2.        W hat does the TOG rating mean?
                 The tog rating describes the warm th or "Therm al Resistance" of a product and is widely used in the UK
                 to explain warm th levels of duvets. Grobags are Tog tested to conform to BS4745:1990. W hen testing
                 we need to allow for a margin of error of 0.5 togs on the upper side. This m eans that our 2.0 tog
                 Grobags will not exceed 2.5 togs, in line with current UK guidelines.


       3.        W hich tog rating?
                 British Standard tog ratings range from 4.5 (sum m er weight duvet) to 15.0 (suitable for very cold
                 winters). 13.5 tog is the m ost com m only used tog in Ireland and the UK. However, with increased usage
                 of central heating, 12.0 and 10.5 togs are becom ing m ore popular.


       4.        Choose your baby's sleeping bag according to season so that he or she stays com fortably warm and
                 does not overheat. Bags are given a tog rating according to the warm th they provide. In W inter a first-
                 size baby sleeping bag should not be m ore than 4 tog. 2.2 tog is the average (this com pares with an
                 adult winter duvet which rates 13 tog). In sum m er you'll need a sleeping bag with a lower tog rating; baby
                 sleeping bags go down to a m inim um of 0.5 tog (the equivalent of two sheets). W hen using a new bag,
                 check your baby to ensure that the design and weight do not lead to overheating, and m ake sure that the
                 room in which your baby sleeps is not too warm (the ideal room tem perature for a baby is 18 degrees
                 C/65 degrees F).


       5.        The British "tog" value is the international standard m easurem ent of all blankets' therm al effectiveness
                 (how well it keeps you warm ). The higher the num ber, the better a blanket keeps you warm .
                 The tog rating--the name was taken from the common slang for clothes--describes the warm th or
                 'Thermal Resistance' of a fabric, and is widely used in the UK to describe warm th levels of duvets and
                 sleeping bags. For exam ple, an adult winter duvet is usually between 10 and 15 togs and a sum m er
                 duvet around 4.5 TOGs. It is recom m ended that quilts for babies and young children above 1 year
                 should be no m ore than 4 togs, and the health professionals recom m end that baby sleeping bags should
                 be of a low tog rating. Tog values need to conform to British Standard BS4745:1990 which is the m ethod
                 for determ ination of therm al resistance of textiles.
                 The tog value of duvets is m easured on a togm eter. This m easurem ent is carefully controlled and
                 described in a British Standard (BS5335:1991).




INTERNATIONAL DOWN AND FEATHER LABORATORY AND INSTITUTE                                                    Page 1       27 February 2008

MAIN OFFICE                    IDFL EUROPE                         IDFL CHINA                        Member ASTM              Visit us at:
1455 South 1100 East           Bahnhofstr. 42                      Tonghui Mid-Road 118, Xiaoshan    Member IABFLO            WWW.IDFL.COM
Salt Lake City, UT 84105 USA   CH-8500 Frauenfeld SWITZERLAND      Hangzhou, Zhejiang 311208 CHINA   Advisor/Member IDFB
Tel: +1 801 467 7611           Tel: +41 52 765 1574                Tel: +86 571 8389 9215            Member CFDIA (China)
Fax: +1 801 467 7711           Fax: +41 52 770 1574                Fax: +86 571 8389 9179            Cosultant ADFS/HFPA (USA)
email: info@idfl.com           email: suomax@idfl.com              email: china@idfl.com             Associate Member EDFA (IDFL Europe)
                                          TOG RATINGS, WARMTH and QUALITY
                                             Some information from the internet (italics added)


                             How does tog rating relate to other "measures of quality"
                             in the new European standards (down content ratings)?

                 TOG Rating                  Classification                          Fill weights required (in g/m 2)
                                                                          85% Dow n           50% Dow n              15% Dow n
                       4.5                   Sum m er                                                                     180
                                                                                                                          250
                       6.0                   Sum m er
                                                                                                                          420
                      10.5                   W arm
                                                                                                  430                     550
                      12.0                   Extra warm                        220
                                                                                                  500                     650
                      13.5                   Extra warm                        250
                                                                                                  570                     720
                      15.0                   Extra warm                        300



                             And how could this relate to recent extensive studies on
                             Fill Power vs. Down Cluster Content, conducted by IDFL?
                                             (Fill Power Studies will be published shortly!)

               TOG             Classification                    Fill Weights (g/m²) and Fill Power (cm³/g)
              Rating
                                                     Net Fill   Average Fill   Net Fill    Average Fill   Net Fill     Average Fill
                                                     Weight     Power of       Weight      Power of       Weight       Power of
                                                     g/m²       85% Down       g/m²        85% Down       g/m²         15% Down

                 4.5           Sum m er                           Approx.                  Approx.          180        Approx.
                                                                350 cm ³/g                 240 cm ³/g                  200 cm ³/g
                  6            Sum m er                                                                     250
                                                                (LORCH-                    (LORCH-                     (LORCH-
                10.5           W arm                                                                        420
                                                                IDFB-                      IDFB-                       IDFB-
                 12            Extra W arm           220        Method)          430       Method)          550        Method)

                13.5           Extra W arm           250                         500                        650

                 15            Extra W arm           300                         570                        720




INTERNATIONAL DOWN AND FEATHER LABORATORY AND INSTITUTE                                                         Page 2       27 February 2008

MAIN OFFICE                        IDFL EUROPE                          IDFL CHINA                        Member ASTM              Visit us at:
1455 South 1100 East               Bahnhofstr. 42                       Tonghui Mid-Road 118, Xiaoshan    Member IABFLO            WWW.IDFL.COM
Salt Lake City, UT 84105 USA       CH-8500 Frauenfeld SWITZERLAND       Hangzhou, Zhejiang 311208 CHINA   Advisor/Member IDFB
Tel: +1 801 467 7611               Tel: +41 52 765 1574                 Tel: +86 571 8389 9215            Member CFDIA (China)
Fax: +1 801 467 7711               Fax: +41 52 770 1574                 Fax: +86 571 8389 9179            Cosultant ADFS/HFPA (USA)
email: info@idfl.com               email: suomax@idfl.com               email: china@idfl.com             Associate Member EDFA (IDFL Europe)

				
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