Close The Loop T-Shirt

T-shirt made from ECONYL® regenerated nylon

55.00 EUR

Close The Loop T-Shirt

T-shirt made from ECONYL® regenerated nylon

55.00 EUR
  • Free shipping from 50,00 €
  • 100-day return period
  • Free Returns
Function and design optimized for:
Ski Touring Ski Touring Mountain Training Mountain Training Climbing Climbing Mountaineering Mountaineering Hiking Hiking

Close The Loop – Join in and help MAMMUT make mountaineering more sustainable with a T-shirt we’ve made entirely from reprocessed waste. The Close The Loop functional T-shirt is 100% ECONYL® regenerated nylon. Some of the material comes from old climbing ropes collected by MAMMUT at select climbing gyms and stores in Switzerland.

The Close The Loop T-shirt is lightweight, functional and perfect for outdoor activities all year round. It dries in no time and has a 3D material structure that makes it extra comfortable on your skin. Offset seams prevent uncomfortable pressure when carrying a backpack. To reduce unpleasant odors, the T-shirt is treated with HeiQ Pure technology developed in Switzerland. This helps conserve resources since less washing is required. And because it’s made of 100% ECONYL® regenerated nylon, the material can be reused over and over again – closing the loop.

The T-shirt was developed by MAMMUT in collaboration with Protect Our Winters Switzerland. A portion of the revenues from sales of the T-shirt will be donated to POW Switzerland.

including VAT Plus shipping
Close The Loop – the project
Who knows? Maybe you will be wearing your retired climbing rope sometime soon as well. Help us close the loop and donate your used ropes to us.
ECONYL® regenerated nylon made from salvaged material
Nylon waste such as fishing nets, fabric scraps, floor coverings and industrial material is rescued from all around the world. The materials are cleaned and refined using a special process, producing ECONYL® regenerated nylon.
Protect Our Winters
POW Switzerland is a non-profit organization committed to responsible action with the aim of reducing the negative impacts of mountaineering. Its mission is to broadly mobilize efforts in the fight to stop climate change – with the support of the mountaineering community.

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Shipping costs
Delivery is free of charge from a purchase value of EUR 120 or more. A delivery charge of EUR 5.95 will be applied to orders below this purchase value.

Delivery lead time
We aim to process all orders as quickly as possible - orders placed before 11 am (Mon-Fri) are generally dispatched on the same day. Orders placed after this time are dispatched the next working day at the latest, which means the delivery lead time is generally up to 5 working days. You will receive a dispatch confirmation including a tracking number as soon as we have transferred the order to our logistics partner. For more informations see Order and Dispatch.

Delivery country
In the online shop for Europe, deliveries can be made only within Belgium and the Netherlands, Denmark, Italy, Poland, Slovenia, Slovakia, Spain, Sweden and Czech Republic, .

Shipment tracking
Together with the dispatch confirmation, you will receive a tracking number and a link which you can then use to check the status of your parcel.


Tops – Men*
Chest in cm 88-91 92-99 100-107 108-115 116-123 124-131
Waist in cm 74-77 78-85 86-93 94-102 103-112 113-121
Hip in cm 87-90 91-98 99-106 107-114 115-122 123-130

Tops – Men: EU-Converter
S S M 170/88B
M M L 175/96B
L L XL 180/104B
XL XL XXL 185/112B
XXL XXL 3XL 190/120B


Mammut supplies its tops in four different fits, from body-hugging and athletic to roomy and comfortable. As a result, all mountain sport lovers can find just the right top to match their body and activities. Some models have a longer cut to offer comfort for the different needs of various kinds of sportive activities.


A very close fit around the upper body and arms, body-hugging, very elastic/stretchable materials.


Dynamic cut, defined body shape, pre-shaped sleeves, elastic/stretchable materials.


A close, athletic cut, with little tailoring, comfortable, some elastic/stretchable materials.


A wide, and in some places longer, cut on the upper body and arms, for a casual and comfortable fit, made from stretch materials.