What are the advantages of wearing the Top Sirio during mountain excursions?

The Sirio Top is designed to offer comfort and lightness on hot days, thanks to the J2 microfibre which guarantees rapid dryness and elasticity, keeping you cool and dry during activity.

Is the Top Sirio suitable for all mountaineering activities?

Yes, the Sirio Top is ideal for mountain activities thanks to its technical features such as the wide shoulder straps and the shallow neckline, which make it practical and functional even with a backpack.

How do you take care of the Top Sirio to keep it in excellent condition?

To preserve the qualities of Top Sirio, we recommend washing it in cold water with a delicate detergent and drying it in the air, avoiding bleaching treatments or tumble dryers.

What is the fit of the Sirio Top? Is it suitable for different body types?

The Sirio Top, thanks to its wide straps and elastic microfibre, offers a comfortable and adaptable fit, ideal for different body types during mountain activities.

In which climatic conditions is it best to wear the Top Sirio?

The Top Sirio is perfect for hot days or as a first layer during mountain activities, thanks to its quick-drying technology and the freshness guaranteed by the J2 microfibre.

Top Sirio

Name: Top Sirio
Brand: Crazy idea
SKU: S26195043D-00.142.M
Price: 37.5 EUR
Availability: InStock

Top Sirio Fast & Light mountaineering tank top in fresh and elastic J2 microfibre

Woman

€75,00 €37,50

Tax included. Shipping calculated at checkout.

Size

XS

S

M

L

Color

Lake

Fast shipping to Italy, Europe, USA, Japan

Low stock - 1 item left
Backordered, shipping soon

Is there a mountaineering vest? Yes, it's Crazy! The Sirio top is the Fast & Light tank top for mountain activities for the hottest days. Produced with fresh and elastic J2 microfibre with rapid dry treatment. The wide straps allow the use of a backpack, the shallow neckline is typical of more technical garments.

Wide shoulder strap

Fast shipping in 24/48 hours.

Shipping details

Returns and Refunds

[{"id":56414566220107,"title":"XS \/ Lake","option1":"XS","option2":"Lake","option3":null,"sku":"S26195043D-00.142.XS","requires_shipping":true,"taxable":true,"featured_image":{"id":82472045347147,"product_id":7646652268763,"position":1,"created_at":"2026-01-29T18:01:02+01:00","updated_at":"2026-03-20T14:23:17+01:00","alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","width":2048,"height":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997","variant_ids":[56414566220107,56414566252875,56414566285643,56414566318411]},"available":false,"name":"Top Sirio - XS \/ Lake","public_title":"XS \/ Lake","options":["XS","Lake"],"price":3750,"weight":125,"compare_at_price":7500,"inventory_management":"shopify","barcode":"8059492041642","featured_media":{"alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","id":70135328833867,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":56414566252875,"title":"S \/ Lake","option1":"S","option2":"Lake","option3":null,"sku":"S26195043D-00.142.S","requires_shipping":true,"taxable":true,"featured_image":{"id":82472045347147,"product_id":7646652268763,"position":1,"created_at":"2026-01-29T18:01:02+01:00","updated_at":"2026-03-20T14:23:17+01:00","alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","width":2048,"height":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997","variant_ids":[56414566220107,56414566252875,56414566285643,56414566318411]},"available":false,"name":"Top Sirio - S \/ Lake","public_title":"S \/ Lake","options":["S","Lake"],"price":3750,"weight":125,"compare_at_price":7500,"inventory_management":"shopify","barcode":"8059492041628","featured_media":{"alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","id":70135328833867,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":56414566285643,"title":"M \/ Lake","option1":"M","option2":"Lake","option3":null,"sku":"S26195043D-00.142.M","requires_shipping":true,"taxable":true,"featured_image":{"id":82472045347147,"product_id":7646652268763,"position":1,"created_at":"2026-01-29T18:01:02+01:00","updated_at":"2026-03-20T14:23:17+01:00","alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","width":2048,"height":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997","variant_ids":[56414566220107,56414566252875,56414566285643,56414566318411]},"available":true,"name":"Top Sirio - M \/ Lake","public_title":"M \/ Lake","options":["M","Lake"],"price":3750,"weight":125,"compare_at_price":7500,"inventory_management":"shopify","barcode":"8059492041611","featured_media":{"alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","id":70135328833867,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":56414566318411,"title":"L \/ Lake","option1":"L","option2":"Lake","option3":null,"sku":"S26195043D-00.142.L","requires_shipping":true,"taxable":true,"featured_image":{"id":82472045347147,"product_id":7646652268763,"position":1,"created_at":"2026-01-29T18:01:02+01:00","updated_at":"2026-03-20T14:23:17+01:00","alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","width":2048,"height":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997","variant_ids":[56414566220107,56414566252875,56414566285643,56414566318411]},"available":false,"name":"Top Sirio - L \/ Lake","public_title":"L \/ Lake","options":["L","Lake"],"price":3750,"weight":125,"compare_at_price":7500,"inventory_management":"shopify","barcode":"8059492041604","featured_media":{"alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","id":70135328833867,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}]

{"id":56414566285643,"title":"M \/ Lake","option1":"M","option2":"Lake","option3":null,"sku":"S26195043D-00.142.M","requires_shipping":true,"taxable":true,"featured_image":{"id":82472045347147,"product_id":7646652268763,"position":1,"created_at":"2026-01-29T18:01:02+01:00","updated_at":"2026-03-20T14:23:17+01:00","alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","width":2048,"height":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997","variant_ids":[56414566220107,56414566252875,56414566285643,56414566318411]},"available":true,"name":"Top Sirio - M \/ Lake","public_title":"M \/ Lake","options":["M","Lake"],"price":3750,"weight":125,"compare_at_price":7500,"inventory_management":"shopify","barcode":"8059492041611","featured_media":{"alt":"Top Sirio Fast \u0026 Light mountaineering tank top in J2 microfibre with wide straps and rapid dry treatment","id":70135328833867,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.bshopzone.it\/cdn\/shop\/files\/S26195043D-00_142_TOP_SIRIO_LAKE.png?v=1774012997"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}