https://www.willswing.com/glider-bag-light-glider-bag-cross-country-glider-bag/

We now have 3 types of glider bags.

The standard bag (far right) that comes on a glider is made from 420D coated
Nylon with 600D polyester reinforcements at the nose, tail and center, and no. 8
YKK zipper. This bag will pack inside a Z5 harness if rolled carefully.

The Light Bag (center) is the same construction without reinforcements or
handles and has a substantially lower pack volume.

The XTRA LIGHT bag (far left) has the smallest pack volume and lightest weight,
and is made from 210D Nylon rip-stop with no. 5 YKK zipper.

For the common 202×20 size used on the T2-144 and Sport 2 155, the standard bag
weighs 3.4 lb, the light bag 2.7 lb and the XC bag 1.7 lbs.

The XTRA LIGHT bag can be compressed to less than 50% of the pack volume of the
standard bag but sacrifices by using lighter material and zipper.

The LIGHT bag packs noticeably smaller than the standard bag with minimal
compromise to durability.