{"product_id":"oneill-womens-thermo-x-long-sleeve-crew-lightweight-warm-base","title":"O'Neill Women's Thermo-X Long Sleeve Crew - Lightweight Warm Base","description":"\u003cp\u003eIn this review the O'Neill Women's Thermo-X Long Sleeve Crew is presented as a practical layering top for cold-water activities and outdoor sessions where sun protection matters. The bottom line: it is ideal for women who want a low-bulk, quick-drying layer that provides \u003cstrong\u003eUPF 50+\u003c\/strong\u003e protection and reliable insulation under a wetsuit or worn alone for paddling, surfing, or pool workouts. The garment's material aims to balance warmth, fit, and drying speed while avoiding interference with wetsuit necklines due to its super low neck design.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPF 50+ Sun Protection:\u003c\/strong\u003e Provides high ultraviolet protection so you can spend extended time on the water with reduced sun exposure risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermo-X Insulation:\u003c\/strong\u003e Layering fabric offers noticeable warmth with low bulk so you stay insulated without restricting movement under a wetsuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick-dry and Water Repellency:\u003c\/strong\u003e The nylon\/spandex blend sheds water and dries quickly so the top does not stay heavy after a session.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOdor Resistance:\u003c\/strong\u003e Built-in odor control keeps the layer feeling fresher between uses, useful for repeated workouts or multi-day trips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuper Low Neck:\u003c\/strong\u003e The low neck sits beneath most wetsuit collars to avoid bunching or added bulk at the neckline.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft, Comfortable Fabric:\u003c\/strong\u003e Customers report a soft, high-quality hand that makes it pleasant to wear directly against the skin.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Thermo-X crew is best for women who take part in cold-water surfing, paddleboarding, open-water swimming in cooler conditions, or water fitness classes and need a functional base layer that provides \u003cstrong\u003ewarmth\u003c\/strong\u003e without bulk. It suits those who value sun protection and quick drying for multi-activity days on the water.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for users who need a loose, oversized casual top or those who require a very roomy fit; several customers note the fit runs small, so women between sizes or who prefer a relaxed fit should consider sizing up or looking for a different cut.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEffective thermal insulation with minimal bulk for layering under wetsuits.\u003c\/li\u003e\n\u003cli\u003eHigh UPF 50+ sun protection and water repellency for extended time outdoors.\u003c\/li\u003e\n\u003cli\u003eSoft, quick-drying fabric with odor resistance improves comfort and usability.\u003c\/li\u003e\n\u003cli\u003eSuper low neck design prevents interference with wetsuit collars.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRuns small for some wearers, so the sizing can be snug and may require ordering a larger size.\u003c\/li\u003e\n\u003cli\u003eNot intended as a heavy insulating standalone wetsuit substitute in very cold water.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eThermo-X Long Sleeve Crew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eO'Neill Wetsuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e220g nylon\/spandex blend\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSun Protection\u003c\/td\u003e\n\u003ctd\u003eUPF 50+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKey Properties\u003c\/td\u003e\n\u003ctd\u003eThermo-X insulation, quick-dry, water repellency, odor resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNeck Style\u003c\/td\u003e\n\u003ctd\u003eSuper low neck to avoid wetsuit interference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended Use\u003c\/td\u003e\n\u003ctd\u003eLayering under wetsuits or stand-alone water activities\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe O'Neill Thermo-X Long Sleeve Crew is a smart choice for active women who need a lightweight, insulating base layer with strong sun protection and fast-drying performance. It delivers good value for anyone layering under a wetsuit or wanting a comfortable top for cooler water activities, though shoppers should account for its snug fit and consider sizing up if between sizes.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this top suitable to wear alone in mild water?\u003c\/strong\u003e\u003cbr\u003eYes, the Thermo-X crew can be worn as a stand-alone top for activities in mild to cool water thanks to its insulation and quick-dry properties.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it interfere with wetsuit collars?\u003c\/strong\u003e\u003cbr\u003eNo, the super low neck design is specifically made to sit beneath most wetsuit collars and avoid bunching at the neck.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I size this layer?\u003c\/strong\u003e\u003cbr\u003eMany customers report a snug fit, so if you prefer a looser fit or are between sizes, order one size larger than your usual size.\u003c\/p\u003e","brand":"O'Neill Wetsuits","offers":[{"title":"Default Title","offer_id":48240170860763,"sku":"B06XGN2T1G","price":71.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61kp9nVZaPL._AC_SL1289_1b59acdb-a4da-4720-ad8e-54ca775bd577.jpg?v=1770917217","url":"https:\/\/gearmusthave.com\/products\/oneill-womens-thermo-x-long-sleeve-crew-lightweight-warm-base","provider":"GearMustHave","version":"1.0","type":"link"}