Premium Rash Guards & Swim Shirts: Ultimate Sun & Surf Protection
A rash guard is a close-fitting swim shirt that prevents chafing, reduces drag, and blocks UV radiation when worn in the water. Six specs determine which rash guard works for your activity: sleeve length, UPF rating, fit, material, chlorine resistance, and age-group sizing. Filter the 359 rash guards and swim shirts in this collection by any of these to narrow to the right style.
Sleeve Length: Long, Short, Sleeveless, or Cap Sleeve
Long sleeve rash guards cover the full arm and are the standard choice for all-day sun protection, surfing, paddle sports, and snorkeling. Short sleeve styles give more shoulder mobility, useful for lap swimming, water aerobics, and pool training. Sleeveless rash guards (also called rash tanks) work well for hot-weather lap sets and layering under a wetsuit. Cap sleeve is a women's-specific option with minimal shoulder coverage, common on crop-style rashguard swimsuits.
UPF Rating: 50+, 30–50, or 15–30
UPF (Ultraviolet Protection Factor) measures the fraction of UV radiation a fabric blocks. UPF 50+ is the highest rating, blocking 98% of UV rays, and is what you want for extended outdoor water activity. UPF 30–50 blocks 96–97% and works for shorter sessions or cloudier conditions. UPF 15–30 is the minimum protection level, typically found on fashion-oriented styles. UPF does not wash out or require reapplication like sunscreen, but intense stretching and wear over several seasons can reduce effectiveness.
Fit: Tight or Loose
The filter distinguishes between a tight fit (also called performance or sport fit) and a loose fit (also called comfort or hybrid fit). Tight-fit rash guards sit snug against the skin, reduce drag in the water, and prevent board chafing during surfing. Loose-fit styles hang more like a t-shirt, breathe better on the beach, and feel less restrictive for casual wear. This is the meaningful difference between a rash guard and a swim shirt: rash guard = tight, swim shirt = loose.
Material & Chlorine Resistance
Rash guards in this collection come in polyester, nylon-spandex, Lycra (and Lycra Xtra Life), elastane, and neoprene (for thermal styles). For frequent pool use, filter by Chlorine Resistant to find styles built to hold shape and color through regular chlorine exposure. Nylon-spandex blends feel softer but break down faster in chlorine; polyester and Lycra Xtra Life last longer in lap-pool rotation. Neoprene thermal rash guards add warmth for cold-water surfing and open-water swimming.
Sizing Across Age Groups
The collection covers women's (XXS–4XL), men's (XS–3XL), girls' and boys' sizes 2T through 20, plus baby sizing from 0-3 months through 24-36 months. Youth sizing uses age bands (Big Kid 7–16, Little Kid 4–6x, Toddler 2T–5T, Baby 0–24 M). For youth rash guards worn over a swimsuit, size up for ease of getting on and off wet skin.
Rash Guards FAQ
What's the difference between a rash guard and a swim shirt?
The difference is fit. A rash guard is tight-fit (performance or sport fit): it sits close to the skin, reduces drag in the water, and prevents chafing from surfboards and wetsuits. A swim shirt is loose-fit (comfort or hybrid fit): it hangs more like a t-shirt, breathes better, and feels less restrictive for casual beach and pool wear. Both can offer UPF 50+ sun protection. Filter this collection by "Rashguard Fit" to switch between the two.
What does UPF 50+ mean?
UPF 50+ is the highest sun protection rating for fabric, blocking 98% of UV rays from reaching your skin. It's the standard to look for if you're spending extended time outdoors near water, where UV reflection off the surface intensifies exposure. Unlike sunscreen, UPF protection doesn't wash off and doesn't need reapplication. UPF 30–50 blocks 96–97% and works for shorter sessions. UPF 15–30 is the minimum rating, typically on fashion-forward styles.
Can I wear a rash guard in a chlorinated pool?
Yes, rash guards work well in chlorinated pools. For frequent pool use (3+ times per week), filter by "Chlorine Resistant" to find styles built to hold their shape and color through regular chlorine exposure. Polyester and Lycra Xtra Life blends last longer in chlorine than standard nylon-spandex. Rinse in fresh water after every pool session to extend life, and dry flat out of direct sunlight.
Do people wear a swimsuit under a rash guard?
Usually yes. Rash guards are typically layered over a swimsuit for surfing, paddle sports, and beach wear. The rash guard blocks sun and prevents chafing while the swimsuit provides support and coverage at the bottom. Some women prefer a built-in shelf bra rash guard (filter by Support: Shelf Bra) for lap swimming and casual wear without a separate top. Rash guard one-piece swimsuits combine both into a single garment.
Should a rash guard fit tight or loose?
It depends on the activity. For surfing, water sports, and competitive swimming, go tight fit so the rash guard doesn't ride up and doesn't drag in the water. For casual beach wear, lap swimming comfort, and all-day sun protection without restriction, loose fit works better. If you're between sizes on a tight-fit style, go up; if you're between sizes on a loose-fit style, go down. Sleeve length should reach the wrist for full UV protection.
