Wooden double ball XL – for back & thighs

The difference isn't in function or hardness – all five woods are equally durable and feel equally effective when you roll. It comes down to personal preference in four areas:

Feel & warmth
Alder feels especially warm and soft in the hands – almost velvety. Beech, ash, oak and walnut feel a little smoother and cooler by comparison, which many people find particularly pleasant.

Weight
Alder is the lightest of the five hardwoods. The other four – beech, ash, oak and walnut – are close to one another in weight.

Scent
Every wood has its own natural smell. Since all our products are treated with linseed oil, that warm, nutty linseed note is always there on first use – a nice sign of natural finishing.

Look & grain
Beech is usually very even and uniform – plain and classic. Alder, ash, oak and walnut, on the other hand, can have beautiful, individual grain: every piece is one of a kind. Walnut stands out with deep, dark tones, oak and ash with bold structure. Purely a matter of taste.

Durability
On longevity, none of the five compromises – they're built to last forever.

Yes, wood doesn't give – that's true. But hard foam fascia rollers from other makers barely give either. The real difference: with these you don't lie on them with your full body weight, you control the pressure yourself. That gives you full control – and that's exactly what makes it comfortable and effective.

Both double balls work on the same principle: the groove in the middle protects the spine while the two balls press into the muscle on either side. The difference is the size – and with it, how the pressure is spread.

Double Ball (7 cm): a smaller diameter means more pressure on a smaller point – ideal for precise, intense work on individual knots, trigger points and smaller muscle groups such as the neck, forearms or Achilles tendon.

Double Ball XL (10 cm): the larger diameter spreads the pressure over more area – which feels gentler, while still reaching deep into the muscle. Particularly good for large areas like the back, thighs and calves, or for sensitive spots where sharp, pinpoint pressure would be uncomfortable.

In short: the regular Double Ball is the specialist for targeted work, the XL the all-rounder for large-area release. If you're unsure, the XL is usually the right call – it's the friendlier starting point.

The nice thing about the rollholz: it fits around your day – you don't have to follow a strict programme. As a rough guide:

Stretching can be done daily, 5–10 minutes is plenty.

Rolling out – the classic back-and-forth over a muscle group – we recommend about twice a week with roughly 3 exercises each time.

Melting – staying on one point until the tension eases – you do as needed, for example when you notice a particularly tight spot. That takes about 1.5 to 4 minutes per spot.

All the techniques, the exercises and what to watch out for are explained in detail in the free e-book you get after your purchase.

The e-book was developed together with sports scientists and therapists and takes you through your fascia training step by step. It has everything you need: from the basics (what are fascia, anyway?) through the two techniques of rolling out and melting, to a large collection of exercises with photos and precise notes for almost every muscle group – for all rollholz products. There's also a section on contraindications, so you know when to pause or ask a doctor.

You get it automatically – just look at the very bottom of your order confirmation email after you buy.