# ENDURANCE THERMOBOOSTER BIB TIGHTS S11 > Assos ENDURANCE THERMOBOOSTER BIB TIGHTS S11 - Warming winter bib tights without chamois, RX EVO Plus, regularFit for layering - Price: 204.00 CHF - Brand: Assos - Category: Knickers / Tights - Availability: in stock - SKU: 11.14.303.18.3XL, 11.14.303.18.2XL, 11.14.303.18.M, 11.14.303.18.L, 11.14.303.18.XL, 11.14.303.18.S, 11.14.303.18.2XS, 2430000019876 ## Assos ENDURANCE THERMOBOOSTER BIB TIGHTS S11 The ENDURANCE THERMOBOOSTER BIB TIGHTS S11 are versatile winter bib tights designed to be worn over your summer bib shorts, for **cross-training**, or as an additional insulation layer in very harsh weather. This model comes **without a chamois**, making it particularly well-suited for layering concepts while avoiding unnecessary bulk. The heart of the design is the **RX EVO Plus** material, which offers the strongest thermal performance within the RX EVO family and wraps large muscle groups tightly thanks to asymmetric stretch. The tights are constructed in **regularFit (unisex)**, available in blackSeries colour, and cover eight sizes from 2XS to 3XL. - **No chamois** for maximum layering freedom over your summer bibs - **RX EVO Plus**: highest insulation performance in the RX EVO family, odour-resistant and abrasion-resistant - **regularFit (unisex)** with close-to-body fit and minimal bulk - **zeroPressure Waist** for pressure-free hold at the waistband - **X-Frame** brace system for stabilising the torso area - **Reflective** leg cuffs for better visibility in low light - **Raw-edge** finishes at waist and ankles with light compression - Material composition: **76% Polyamide / 24% Elastane** - Compatible for layering with ASSOS **R** and **TACTICA** series - Also suitable for **skating, running** or warming up before interval training ## Technical Details and Features The **RX EVO Plus** textile provides strong thermal performance with minimal bulk through its dense yet elastic structure, efficiently retaining body heat in the microclimate. It's odour-resistant, resists abrasion, and stays deep black when stretched rather than lightening, which benefits the premium look over time. The **raw-edge** finishes at waist and ankles sit with light compression and reduce transitions under overshoes or socks. The **zeroPressure Waist** construction distributes pressure generously at the waistband and prevents uncomfortable pinching during long periods in the saddle. The **X-Frame** brace system – derived from the racing series – stabilises the torso area so the tights sit calmly in both aero and upright riding positions. **Reflective** strips on the lower legs increase visibility in poor light conditions throughout the entire pedal stroke. ## Applications and Benefits These tights show their strengths on cold, rather **dry winter days** – worn solo over summer bibs or as an additional insulation layer over spring/autumn or winter tights. For very harsh conditions, they integrate seamlessly into a multi-layer system with pieces from the **R** and **TACTICA** collections without adding unnecessary bulk. Those who train holistically also use them for **running or skiing** when no chamois is needed. The combination of minimal bulk, stabilising brace system, and **reflective** details makes them equally suitable for commuting routes around Zurich as for long base training sessions on road or gravel bikes. The absence of a second chamois also prevents friction points with multiple layers and supports a smooth, efficient pedalling feel. ## Fit and Size Guide The ENDURANCE THERMOBOOSTER BIB TIGHTS S11 fits in **regularFit (unisex)** and is designed to pull on easily over your usual summer bib shorts. Thanks to raw-edge construction and moderate compression, the profile stays slim, making putting on and taking off easier during indoor warm-ups or pit stops. Available in eight sizes from **2XS to 3XL**, they cover a broad spectrum and leave enough room for the desired base layer underneath. For cool to cold, dry conditions, wear them over your summer bibs; in **extreme** winter weather, add them as an additional insulation layer in an ASSOS layering setup. ## Variants - 11.14.303.18.3XL: in stock - 11.14.303.18.2XL: in stock - 11.14.303.18.M: in stock - 11.14.303.18.L: in stock - 11.14.303.18.XL: in stock - 11.14.303.18.S: in stock - 11.14.303.18.2XS: in stock - 2430000019876: in stock --- Source: https://kilometro.ch/en/products/knickers-tights-665/endurance-thermobooster-bib-tights-s11-799