Gymshark Shadow Seamless T-Shirt vs Smartwool Active Ultralite Short Sleeve

Buy the Gymshark Shadow Seamless if you want a tight, physique-flattering gym top and mostly lift indoors. Buy the Smartwool Active Ultralite if you sweat hard, train outdoors or wear one shirt across gym, run and hike. The Gymshark wins on muscle-hugging fit and heavy seamless fabric; the Smartwool wins on breathability, odor control and temperature regulation thanks to its merino-Tencel blend. Owners of seamless nylon tops report they hold shape but can feel warm and clingy when soaked, while merino blend wearers praise all-day freshness but note the fabric is thin and less compressive.

• Choose the Gymshark Shadow Seamless if you want a compressive muscle fit and a tonal jacquard look for the gym floor.
• Choose the Smartwool Active Ultralite if you want one light, odor-resistant tee for sweaty gym sessions, runs and hikes.