hms4271495wrote a review of Pearl Izumi Transfer Baselayer - Sleeveless - Men's on December 6, 2011
Every time they unzip up a climb, I've seen that shirt under their jerseys. I knew it must have been important but I didn't know why until a neighbor who races cat 3 suggested a winter kit list. So I tried one. Now the shoulder straps on the bibs don't bother me and I stay warmer and drier.