The Endurance XP Boxers from CXP are premium men’s running underwear designed for comfort, performance, and style. Engineered using advanced fabrics and technologies, these boxers aim to provide an elevated experience for workouts and other physical activities. The famous ultrarunner Zach Miller endorses these boxers, putting them through many miles of testing to get the construction to wear it is today. I put these to the test whilst training for the Race Across Scotland and on race day at the recent Ultra Wales 50 to see if they live up to the hype.

Material and Build Quality

The CXP Endurance XP Boxers are made from a blend of high-quality fabrics, including mainly nylon and elastane. This combination results in a lightweight, breathable fabric that feels soft against the skin while maintaining a snug, supportive fit. The fabric’s moisture-wicking properties are particularly noteworthy, as they effectively manage sweat, which kept me dry and comfortable throughout my runs. This feature makes these boxers ideal for both long runs and high-intensity activities. Stitching is precise and durable, and they are constructed to prevent chafing, even during extended wear or rigorous activities. The waistband is wide and elastic, providing a secure fit without digging into the skin, and has silicone grips.

Comfort and Fit

Comfort is a key selling point of the CXP Endurance XP Boxers. The design includes a contoured pouch that provides adequate support without being overly restrictive. This feature is essential for active wear, as it helps to reduce movement and discomfort during running activities. I found the boxers fit me true to size, with a stretchy yet supportive feel that will accommodate various body types. The inclusion of elastane in the fabric blend ensures that the boxers move with the body, reducing the likelihood of bunching or riding up, which can be particularly annoying during runs or workouts. The silicone grips in the waistband are a good addition, which keeps the waistband in place and doesn’t roll, adding to the overall comfort. I’ve noticed that the fit has remained consistent even after multiple washes and many miles over different types of runs on varying types of terrain.

Performance

Performance-wise, the CXP Endurance XP Boxers excel in various conditions. The fabric is moisture-wicking and I found was highly effective. I found they maintained comfort and dryness. Additionally, the breathability of the fabric prevented any overheating. The lightweight nature of the fabric ensured that the boxers didn’t feel heavy or cumbersome, even on hot and humid runs when I was sweating more. I experienced zero chafing, even on race day at the Ultra Wales 50 wear I was out running on the mountainous trails for 12 hours.

Durability

In terms of durability, the CXP Endurance XP Boxers held up well to repeated washing and wearing. I’ve worn and washed them over 30+ times whilst testing them. The colour and fabric integrity have remained intact, without any significant pilling or loss of elasticity. The stitching also remains firm, with no signs of fraying, which I’ve found was a common issue in lesser-quality items. The waistband has retained its elasticity over this time, and they still look and feel new. This durability makes the CXP React XP Boxers a good investment for a serious ultrarunner, as they offer long-term value.

Design and Aesthetics

I love the design of the CXP Endurance XP Boxers, they are sleek and modern, appealing to those who prefer a minimalist aesthetic. They come in a black or navy, and 5” or 7” length, allowing users to choose according to their personal style preferences. The branding is subtle, limited to a logo on the front of the waistband and a smaller endurance logo on the rear, which adds to the clean and stylish look. The length of the legs is well-proportioned, offering enough coverage to prevent chafing without being too long to feel restrictive. I tested both sizes and both gave the same level of comfort and support.

Value for Money

While the CXP Endurance XP Boxers are priced higher than average, they offer excellent value for money considering their performance, comfort, and durability. For those who prioritise quality and are willing to invest in premium running underwear, these boxers are a worthwhile purchase. Given their long-lasting nature and superior performance features, they are cost-effective in the long run, as they will no doubt outlast cheaper alternatives and provide a more comfortable and reliable experience for any serious runner.

Final Verdict

The CXP Endurance XP Boxers are an excellent choice for anyone looking for high-quality, comfortable, and durable underwear that performs well in different scenarios. Their superior fabric, thoughtful design, and reliable construction make them a standout option in the premium men’s sports underwear market. While they come at a higher price point, the investment is justified by the longevity and performance of the product. Whether you’re wearing them for a training run or an ultramarathon, the CXP Endurance XP Boxers deliver comfort, support, and style.