Castelli Core Seamless Sleeveless Base Layer (White) (2XL)

Castelli Core Seamless Sleeveless Base Layer (White) (2XL)
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The traditional nylon/Lycra construction of most seamless base layers tends to hold a lot of moisture – so Castelli engineered this Core Seamless. A mixture of polyester and polypropylene moves moisture away from your body with absolutely minimal moisture uptake. The fabric is soft next to your skin and provides great temperature regulation in mild conditions. It's not for hot temperatures but it does work as a first layer even into cooler temperatures, while the seamless construction keeps it extremely comfortable next to your skin.


  • Seamless lightweight drying layer
  • Ideal for cool to mild conditions when keeping yourself dry is the priority
  • Unique mix of polyester and polypropylene provides maximum moisture management with significantly lighter weight
  • Seamless construction gives exceptionally stretchy fit
  • Temperature Range 59 - 77°F (15 - 25°C)
  • Weight: 45 g

Gender: Men
Fabric: Seamless
Sleeve Length: Sleeveless
Color: White

This product was added to our catalog on January 13, 2022

Castelli Sizing: Many Castelli products are designed with a European race-fit. It is not uncommon to size up one size for a standard, race fit or two sizes for a more relaxed fit.

Measurement Guide:

  1. Chest: Measure the circumference around the fullest part of chest, under arms
  2. Waist: Measure circumference around natural waistline keeping the tape a bit loose

Circumference (in)
Circumference (in)

Note: All measurements are provided by the manufacturer and may vary depending on how measurements are acquired. Castelli instructs that for best results measurements be taken over underwear. Castelli recommends sizing up if measurements fall between sizes for a better fit.