This season's best warm-up jacket is Under Armour's Men's Rival Knit Warm-Up Jacket. Its HeatGear technology keeps you feeling cool and dry, while its loose fit allows you to move wherever and however you want without difficulty.
The Rival Knit Warm-Up Jacket has a loose fit. This type of fit, unlike a compression fit which can sometimes restrict your movements or make them much more difficult than they really need to be, enhances your overall mobility and allows you to move freely without any type of uncomfortable pulling or restriction; wherever you go, this top will follow. A loose fit also enhances the breathability capabilities of this shirt. Since it doesn’t sit so close to your body or aren't designed to hug your body, air is able to move within the shirt easily and quickly so that you stay at a comfortable temperature, especially when you need to most.
The Under Armour Rival Knit Warm-Up Jacket features Under Armour's game changing HeatGear technology. Unlike ColdGear and AllSeasonGear, which are meant to be worn during winter and fall temperatures, this type of technology is designed to be worn during the extreme temperatures of the summer (75 degrees or above). The super lightweight fabric will deliver excellent coverage, but without weighing you down with any unnecessary bulk or weight. All HeatGear apparel features the Signature Moisture Transport System, 4-way stretch fabric, anti-microbial technology, and a flatlock seam construction. Under Armour's Signature Moisture Transport System is designed to wick sweat away from your body then push it to the surface of the fabric, where it can then evaporate at an incredibly rapid rate. The 4-way stretch fabric also assists with the drying process. Although this fabric allows you to move in any given direction without any restriction or difficulty, it also decreases the amount of time it takes for the fabric to dry. More often times than not, sweat is accompanied by unwanted odor. This fabric is treated in anti-microbial agents which are designed to specifically target odor causing microbes and completely eliminate them. So, altogether the Signature Moisture Transport System, 4-way stretch fabric, and anti-odor technology will keep you dry, cool, and fresh during the heat of your workout sessions. Lastly, the flatlock seam construction will keep your skin from getting irritated while you move around. The seams are constructed to lay flat against your skin, completely eliminating all chances of rubbing, chafing, or any type of irritation from the flatlock seam construction.
In short, the Under Armour Men's Rival Knit Warm-Up Jacket is the ideal jacket to be wearing this season. The loose fit of the jacket allows you to move in any given direction without any type of restriction or difficulty. The side seam pockets allow you to easily store your smaller personal items, while the HeatGear keeps you feeling fresh, cool, dry, and at a comfortable temperature at all times.