I have a JRB Greylock 3 20 degree that I would like to trade for a Warbonnet Yeti 40 degree. Will also consider a 3 season 20 degree Yeti. My goal is to find a low-weight/low volume partial UQ for summer backpacking to supplement a full length shoulder and winter UQ. The Greylock has been modified with Arrowhead Triangle Thingnies by shortening the shock cord suspension. Works great with my 11 foot DH Darien. Weight is ~19 Oz, which would indicate the Greylock is overstuffed. I have taken the quilt down into the 30s comfortably. Tag is from 2015 and likely features the 1.1 oz 30 denier fabric. Dimensions are 42 x 52 which is more of a 3/4 underquilt. Good for taller hammockers or those that seek additional coverage for shoulder seasons. I do not have the original JRB stuff sack. I can send photos if interested.