SMARTWOOL Classic Base Layer Crew 100% Merino Knit - super warm! Amazing for travel, you can wear this multiple days in a row without it stinking Thermal weight - I purchased this so long ago I don't have tags or receipts, but I'm 99.9999999% sure this is the Thermal line and NOT the All-Season line. The thermal line is extra thick. If you get cold easily, this is an amazing base layer that beats most, but gosh I can't even think about putting this on unless it's 9F outside :-) Size Small - the fit hugs your body, please see measurements. I like the extra length for tucking into your pants for extra warmth In great condition, the screen printed Smartwool guy logo is a bit faded. I don't reach for this baselayer much since it's so warm and I run hot. It's a buy it for life kind of product. It no longer fits me, so please give it a new home! No weird smells, holes, or stains. Maybe some faint wear on the surface of the fabric, since it's not new. Approximate measurements taken from garment laying flat (please double for circumference): PTP - 15.5" Shoulder width seam to seam - 14" Length, shoulder to hem - 25" Sleeve length, shoulder seam to cuff - 24" Comes from a smoke-free, fragrance free environment I do own kittens, but they are not allowed in my closet :-) If you see something you like, send me an offer! You won't offend me with your offers, offer away