Anfibio Sigma as an extended version with TubeBags
The long-awaited version of the proven Anfibio Sigma has extra large TubeBags (luggage compartment in the tube) and 20 cm more inner length. The flexible positioning of the front seat and the variable fixation of the second backrest are interesting. The boat is therefore suitable as a fast one (middle seating position) and as a classic two. 
Configuration and equipment
The Sigma TXL combines suitability for touring with weight that is suitable for backpacking. With an interior length of 180cm, it offers enough space for two people. Ridden as a single vehicle, with an external length of 280cm it is comparatively fast and stable. Otherwise it is kept compact with a hose diameter of 27cm. As is typical for Sigma, the lower panels of the bow and rear segments remain made of reinforced floor material.
Seating system
The boat comes standard with a variable seating system, consisting of a freely positionable block seat and an adjustable comfort backrest/belt as well as an additional rear seat with a backrest.
Ridden as a single person - with one seat in the central seating position - the bow and stern symmetry make the boat similar to a conventional kayak and its handling characteristics. The block seat and backrest can be individually adjusted and therefore adapted to paddlers of different sizes.
In addition to the TubeBags, the Sigma TXL then offers additional storage space for luggage behind the central seat. In order to create space for a partner at the back, the central seat and the backrest can simply be moved forward and the rear area with the Anfibio WideSeat with backrest ( (included in delivery).
TubeBags
The Anfibio Sigma TXL is also equipped with extra large Anfibio TubeBags as standard. These are two centrally positioned, IPX7 waterproof luggage zippers with directly positioned, airtight inner pockets (100 l each). The respective luggage compartment and the main air chamber thus form two separate air spaces. The zippers do not have to be airtight to do their job, as this is not necessary due to the design. Even when opened slightly (!), the system continues to function. This makes it very resistant to dirt and wear:
Luggage is automatically positioned correctly and secured against slipping
Internal transport ensures a low center of gravity, protection from moisture and reduced susceptibility to wind
the boat's transport capacity is significantly increased
Setup: First stow the luggage (load the inside pockets), then close the zippers, then inflate the main air chamber. 
Dismantling: First open the main valve! Then unload the zippers and luggage.
Floor mat (optional) An inflatable floor mat is optionally  available
for the Sigma TXL . It stiffens the floor or the entire torso, insulates against cold and wet and increases the sitting position. This improves driving comfort, driving characteristics, possible uses and control of the packraft. Attention: in combination with the floor mat, we recommend the Anfibio FoamSeat or the Anfibio PackSeat (light) for the front seat and the Anfibio PackSeat (with backrest) for the back seat. The seats included are too high for this. Application The use depends heavily on whether it is used as a one or two. As a single, the comparatively long shape is ideal for extended tours and long distances on calm waters, possibly with a lot of luggage (or children/dogs).  Pack size and weight (3.2 kg) remain suitable for backpacking, but are not ultralight. 
Use in whitewater is not recommended for two people - the buoyancy of the 27 cm wide hoses (especially without a spray deck) is not sufficient. Due to the comparatively light format (3.5 kg), classic packrafting tours (combined tours on land and water) with partners and luggage are easily possible:
Water walks
Trekking with water elements
Geocaching
Adventure races and expediton