This best-selling Under Armour T-shirt is just $13 for Prime Day — and it's my top deal pick this summer

The best-selling Under Armour tee is on sale during Prime Day, and you can now grab the Under Armour Tech 2.0 short-sleeve T-shirt for just $13 at Amazon, which is almost 50% offThere are plenty of colors and sizing options to choose from, so you should be able to pick up a range of discounts depending on your choice.I own this T-shirt, and it's a staple summer workout top for me because it dries really quickly (I'm a sweaty exerciser, I won't lie), plus it's super breathable for those warmer (scorching) temperatures we're currently having. I typically train in the men's model, but you can pick up the women's sculpted UA Tech 2.0 T-shirt for $17 at Amazon, too.Why I'd shop the Under Armour Tech 2.0 T-shirt during Prime DayThe Under Armour Tech 2.0 workout T-shirt is voted Amazon's best-selling workout T-shirt and has remained so for years.I love the design and color options, as you can go bright and bold or pared back and casual. Either way, I've got so many of my friends onto this workout tee because it's so perfect for summer, giving you a lightweight and breathable option for workouts when you don't want to be topless or you just need something to throw on for casual meet-ups with mates.The UA Tech fabric is quick-drying, soft, breathable and stretchy. I like to train in the men's because it's looser, but the women's model cinches in at the waist. I recommend sizing up if you want to remain breezy and free when you exercise.It's made from 100% polyester and stays cool while wicking sweat. I was curious to know what others thought, so I had a quick scour of the recent reviews, which also complement the lightweight, airy feel. And it's so affordable this Prime Day that you can buy multiple color options if you need to restock your activewear.I wore this T-shirt while training at the Under Armour Academy for fitness testing, and I've since worn it on runs, during strength training, and in hybrid classes. I expect the stock to go fast, so I strongly recommend shopping now before the deal runs out. Anything for just $13 at Under Armour is a win!