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Coolibar UPF 50+ Men's Calasa Tech Swim Trunks - Sun Protective
Coolibar UPF 50+ Men's Calasa Tech Swim Trunks - Sun Protective
  • Polyester/Spandex Blend
  • Snap closure
  • UPF 50+ - blocks 98% of UV radiation
  • Aqua Plus Lite™ fabric is a lightweight woven fabric treated with a Durable Water Repellent finish (DWR) so that water beads-up and rolls off the surface
  • "Versatile double shorts, side hand pockets and invisible zipper leg pockets; 9 inch inseam"
  • "Snap front closure with zip fly, elastic waistband at back with side hook and loop fastener adjustment for custom fit; Detachable knit liner and back yoke panel for added mobility; Easy care: machine wash, line dry; Imported"
  • "Recommended for swimming and water sports like snorkeling, surfing and waterskiing"


Double-layered, double the value! The Calasa Tech Swim Trunks feature a versatile, double-short design, with a detachable inner liner and lightweight, quick-dry, water-repellent woven outer short.

Get the look of a board short with a secure inner liner. Detach the inside liner and use the outer Tech Trunks as a great pair of everyday shorts. Made in our top-of-the-line Aqua Plus UPF 50+ fabric, you just might declare these our best mens trunks yet!

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Snorkel, swim or stand up paddleboard in durable and comfortable UPF 50+ protection made to stretch and respond to vigorous movement. As long as light is visible in water, UV rays are penetrating through. Coolibar UV protective swimwear is lightweight, 4-way stretch, and chlorine- and saltwater- resistant.


We believe everyone deserves the right to an active, outdoor lifestyle in the sun, so we promise Coolibar clothing and accessories are UPF 50+. Sun protection is our sole purpose. That’s why we custom design, produce and offer technically elegant styles in proprietary fabrics that block 98% of UV rays.

As trusted experts in sun safety, we know the more you're covered, the more you're protected, and the more you'll enjoy a carefree life outside. We’ll never compromise on protection. We’ll never skimp on quality. We’ll always test our fabrics for UPF 50+ protection like your life depends on it - because it does. Welcome to health, happiness, and Coolibar life in the sun.

  • Product Dimensions: 11 x 6.5 x 2 inches
  • Date First Available: March 21, 2016
  • ASIN: B01D94W23G
  • Amazon Best Sellers Rank: #474,748 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry)
    • #607 in Men's Swim Trunks
    • #147812 in Men's Shops

    One of the better swim trunks I've purchased in terms of quality versus price. The waist is a nice combination of a straight formal looking pair of shorts in the front and a stretch waist in the back with adjustable Velcro tabs on the side. The unique style of separate removable liner is an interesting concept, but I haven't tested it in the pool yet. On land, the removable liner is just like wearing sports underwear with shorts, instead of mesh liner typically used in swim trunks. I don't particularly like the way the liner connects to the swim trunks with 3 skinny snap loops, but I'm not sure what other options would have been better. One thing I really like about these swim trunks is the two zipper pockets on the side to keep items secured while swimming. Overall, it's a quality product and I will consider purchasing more after actually testing it in the pool.

    We just received these swim trunk for my husband with a waist of 31". We ordered the medium but should have ordered the small. Luckily, there is a waist adjustment (ladies with kids, don't laugh), so he can tighten them.

    Won’t know if item fits until after the holidays as I gave it as a gift. Always liked Coolibar products, don’t anticipate the recipient to be unhappy.

    Nice swimsuit. I am usually a 34 and found the large to fit best. The medium was way too tight. I really like the detachable liner too, it will be great for traveling

    Bought this for my husband. Very well made but runs large. I recommend ordering a size down.

    Great and versatile pair of swim trunks. Got as a gift for my father in law, he really likes it and is taking it on his cruise to the Caribbean soon.


    LOVE these!! My husband wore them for 3 days at the beach and NEVER got chaffed. He wants another pair!!