The fully customizable, tilt-in-space Trekker accommodates functional or rest positions, providing increased sitting tolerance for maximal comfort. The Trekker comes in a range of colors and is an easy-to-use, portable chair that meets the needs of caregiver, user and therapist or physician. It features a separate base and seating module, which is reversible, so the user can face away or toward the caregiver. Trekker also accepts adaptive and aftermarket seating to accommodate the needs of therapists and users. The chair allows up to 170° of adjustable recline and tilt ranging from -5° to 45°.