{"product_id":"under-armour-mens-performance-tech-long-leg-boxer-brief-all-day-90","title":"Under Armour Men's Performance Tech Long-Leg Boxer Brief - All-Day 90%","description":"\u003cp\u003eIn this review of the Under Armour Men's Multi-Pack Performance Tech Long-Leg Boxer Brief, the bottom line is simple: these are aimed at active guys who want soft, breathable underwear that stays in place during long runs and workouts. The single biggest reason to buy is the fabric and fit combination - a 90% polyester, 10% elastane blend with 4-way stretch that wicks sweat and dries fast, delivering consistent comfort through heavy activity. For anyone who values length, a seam-free back and quick-drying performance, this boxer brief is worth trying.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft performance fabric:\u003c\/strong\u003e The 90% polyester and 10% elastane blend provides an instantly soft feel that reduces chafing during extended wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture-wicking:\u003c\/strong\u003e Material moves sweat away from the skin and dries quickly to help keep the wearer comfortable during intense exercise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-way stretch construction:\u003c\/strong\u003e The stretch fabric allows freedom of movement in every direction, useful for running, lifting or everyday activity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticulated mesh fly panel and gusset:\u003c\/strong\u003e Targeted mesh improves airflow and adds comfort where ventilation matters most.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo side or back seams:\u003c\/strong\u003e The smooth construction reduces irritation and pressure points under tight clothing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThese boxer briefs suit men who regularly exercise, run or work long shifts and need underwear that stays in place and handles sweat. The 9' inseam provides extra coverage and prevents riding up for those who prefer longer leg length during activity.\u003c\/p\u003e\u003cp\u003eMen who prioritize durability above all else or who need natural fibers exclusively may want to look elsewhere, since this style is synthetic-dominant and some customers have reported inconsistent longevity at the seams.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVery comfortable, with customers praising the soft hand and secure fit that helps them stay in place during runs.\u003c\/li\u003e\n\u003cli\u003eExcellent moisture management; fabric wicks sweat and dries fast even during heavy workouts.\u003c\/li\u003e\n\u003cli\u003eSeamless side and back design reduces friction when worn under tight clothing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome users reported seam failure on certain pairs, indicating variable durability between production runs.\u003c\/li\u003e\n\u003cli\u003eThose who prefer natural fibers may dislike the mostly polyester construction.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eUnder Armour Apparel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e90% Polyester, 10% Elastane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInseam\u003c\/td\u003e\n\u003ctd\u003e9 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003e4-way stretch, no side or back seams\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVentilation\u003c\/td\u003e\n\u003ctd\u003eArticulated mesh fly panel and gusset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerformance\u003c\/td\u003e\n\u003ctd\u003eMoisture-wicking and quick-dry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThese long-leg boxer briefs are a smart pick for active men who want a soft, moisture-managing underwear that stays in place during exercise. While a few reports note seam problems, the fit, fabric performance and seam-free design make them good value for most athletes and commuters who need reliable, comfortable daily performance underwear.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre these good for running?\u003c\/strong\u003e\u003cbr\u003eYes. The 4-way stretch, longer 9 in inseam and moisture-wicking fabric make them suitable for running and dynamic training.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo they dry quickly after sweating?\u003c\/strong\u003e\u003cbr\u003eYes. The polyester-rich blend is designed to wick sweat and dry faster than cotton alternatives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill they stay in place or ride up?\u003c\/strong\u003e\u003cbr\u003eMost customers report they stay in place thanks to the fit and stretch construction, though fit can vary by body shape.\u003c\/p\u003e","brand":"Under Armour Apparel","offers":[{"title":"Default Title","offer_id":48188849553627,"sku":"B0FMYTN9FV","price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71ZKSXgnrVL._AC_SL1500.jpg?v=1769651817","url":"https:\/\/gearmusthave.com\/products\/under-armour-mens-performance-tech-long-leg-boxer-brief-all-day-90","provider":"GearMustHave","version":"1.0","type":"link"}