I like these TSLA thermal baselayer shirts so much I have bought 2 short sleeve and 2 long sleeve. They should fit snug, but not tight, and I was very pleased that the medium is the best size for me. I found large to be a little loose. The shirts are well constructed in cut, stitching, and fabric choice. The outside is smooth, but the inside is knit so that it is a bit fuzzy. The overall fabric has more thickness than just a lycra compression athletic shirt. It gives more warmth, yet still transports moisture well. Look for "Heatlock" in the description, and you won't be disappointed.
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