Built around the same fit ratio we use to shape our Zip Fit shirt, our T-shirts are wider in the chest and shoulders, taper to a slimmer waist, and will accentuate any athletic form. Our proprietary Tedra™ jersey is an incredibly unique fabric- this is the first time it's available outside of Thailand where it is patented. The collagen is a byproduct of the fishing industry and is spun from the scales of the milkfish. Infusing modal with collagen gives it antimicrobial properties in addition to making it incredibly soft.