I generally prefer to sleep in my underwear. However I sometimes wake up a bit chilly(I sleep under an old fashioned quilt). So for the past few years Ive been using Patagonia thermal "long johns" as pajamas. In those I often wake up to warm. So I sorta began soft shopping for pajama bottomsA few years ago I discovered & falling in love w/the Calvin Klein boxer briefs made of 92% &/or 87% "Modal. One day I figured I'd check and see what CK had for pajamas & I found these.I can already say these are absolutely AMAZING!!!Even tho I just received them today & have been wearing them around the house. The comfort is off the charts. One of those rare articles of clothing that actually feel better on than off.I have been a CK cutomer for many years so I feel comfortable giving an early 5 Star review because i know the build quality will be excellent.Anyone looking for an extremely light & comfortable pajama bottom or something to lounge around the house. I highly recommendPS-I saw sum people mention in the reviews that they are "see thru". I assume the purchased a light color? White or grey? Either way IMO these are for around the house. I would not wear these to the store or anything like that. I already see to may people(mostly women) in their pajamas at the store. It's NEVER a good look