Sisus:

Finnish term that could be roughly translated into English as strength of will, determination, perseverance, and acting rationally in the face of adversity. The equivalent in English is "to have guts", and indeed, the word derives from sisus, which means something inner or interior. However, sisu has a long-term element in it; it is not momentary courage, but the ability to sustain the same.

But here Sisus is the name of company, which provide the services related to the Shower Helper, bath, Wheelchair Accessible Bathrooms which is easily Accessible for the handicapped persons. Due to its cultural significance, Sisu is a common element of brand names in Finland. For example, Mount Sisu is the name of a mountain discovered by mountain climber Veikka Gustafsson in the Antarctic. Depending on context, "sisu" can refer to spunk, attitude, self-confidence, and so on.