REI Co-op offers the REI Co-op Men's Long-Sleeve Tech T-Shirt in Charcoal Heather for $16.93. Opt for in-store pickup to avoid the $5.99 shipping fee. That's tied with last month's mention at $8 off list and the lowest price we could find. It's available in size XL and XXL only.

Update: The price has dropped to $12.69.