This is a fabulous training top. I live in Kolkata and it is quite cold in winter. I wanted a running top which would not be bulky but also insulate me to an extent. And this is a great product which does just that. Full sleeved, with a hoodie and with a zipper so you can zip it till your neck. Additionally, two very convenient pockets(one with a zipper) to carry essentials. And yes, not to forget, the thumb slots are also a thoughtful addition. I think this can be worn in summer as well to protect arms from excessive tanning. Overall, this was my favorite buy at Truerevo and I highly recommend it.